Dragsaw attachment for tractors



July 4, 1950 R. E. VON RUDEN DRAGSAW ATTACHMENT FOR TRACTORS Filed Aug. 18, 1945 AZZarne .s'

Patented July 4, 1950 UN ITED QFFTCE.

DRAGSAW' ATTACHMENT'L'EOR TRACTORS Raymondi EilVOn Ruden, Glaremont,':=Minn ,1 ass:

signor' ofv'fifty pjer: eenta'to :Norbert Af-qvon RudemIMinneap Iis; Minn;

Application August"18, 1945, Serial 6112327 1 Claim: 1:]

This inventionrelatesto'a saw structure; and. While the invention might have various' applications; it particularly'is' designed to comprise a sawdriven fronia rotating means carriedonastationary support such'as a tractor frame; It isthe commonpracti'cetohave a sa'vr-driven from a rotating shaft mounted on an au-tomobile ortractor. It is desirable to have a structure-by means of which the saw can bemoved freely to different positions and can-be'- operatd in either ahorizontalpr-vertical -directioni- It is an object of 5 this invention therefore to providea comparatively simple and efficient structure comprising' a saw wh'ich can be moved to operate either ina h'orizontal plane or-in -a v'er' tical plane.

It is another object 'of the-invention to provide in combination with an automotive vehicle or tractor having-adriving means,-a=stationarysup= port secured to said tractor, a'pivot member se cured to said support, frame sW-ingabie about said pivot member; a shaft jour'naledin' said frame; a driving connectionb'etweensaid 'means andshaft, asaw'carriedb'y'said frame, anda driving connection between-said shaftand' saw whereby said frame and' saw can be=-moved to various positions and-saidsaw operated eitlier in a horizontal or vertical plane.

It is a further object of the invention to provide in combinationwith" a stationary" support having a rotating driving means carried thereby, a frame "secured to said supportan'd rot'atable relatively: thereto about axes extending at right anglesto each other, a shaft joi'irnaled in' said frame, a drivin'gconnection between=said=means and shaft, a reciprocating" saw carried -by 'sa'id frame, and a driving-connection between said shaft and saw' whereby said framean'd saw can be swung about'a Horizontal axis'and about a vertical axis.

It-is also an object of 'theinvention to provi'de in combination with "a stationary support hav-' ing a driving means carried thereby; a frame connected to saidsupportand'rotatabie about three axes atright'angles' to eachotl'ier, aishaft journaled in said fra'maa driving=connection be tween said -means-and siiaft, a saw" carriedby said frame, and a driving connection? between said shaft and saw.

It is more specifically aniobj act of: the.i-1inven" tion to provide in combination with a tractor havinga rotating shaft; a stationari s supportzs e cured to said" tractor, a pivot' m'emberwsecur'ed to saidsupport extending? substantially; at right angles to th'e axisfof saidzshaft; a fram'emswing able about saidpivot memben'andxa'dapted toiex-r tend'i-generailyandirection substantia1=1y,-para-b lei -to said shaft a isecondzsshaft journaled in said frame;- an extensibies.andacontractable driving:

' means :between zsaidashaft's; zthe samevrpreferabiy having -universa1 'ijointsxconnected :toisa'id shafts} abeveled gearr securedi to said second shaftpasecond I 'bevei'ed 'gear 'meshingz with; said. beveled. gear; a cranksecirredztossaidrsecond'b'eveiedI'gear; a pitmansecur'edntofsaidzcrank;.a cross-head Se:- cnred to said pitman iaIIdi imiovingr t on 'a g-uidewirr saidframe;: a reciprocatingzsaw secured to. said CFDSS -Head, an'di meansifconnectedi to; saidrzframe adapted'to be connected: toflatree .or other object to b'eaisa'wedi 1 These and' otheri oldjectsiandiadvantages of -.the invention wil l be -ful iy"settforth'zin the foil-owing dsoriptionmade in connection witlrrthe accompanying drawingsnin whicha like :reference asters refer to similar. parts throughout .the asev eral viewsan'd in which:

Fig: l is aplan view of th e device sh owing a' portion of atractor and showingan ob'jectito be sawed; the latter being'dn horizontal "section; Fig; 2 is: a viewside *eievation as -seen' from the bottomof' Fig;-1" ass a vertioal section-taken on '1ine" 3'-'-3 of Fig: 2"; as indicated b'y- 'tiie arrows; and" Fig; 4- is a -v'ertica-1-sectien' taken on line? 4 -4 of 2, as-indicated bythe' arrows-5 Referringto the drawings a portion-"0f "a trac tor" I Iiis shoWn'comprisi-ng a frame I Ba; Wheels ii -Z5," transmission casing Ilic, a rotatable driving means on shaft I fid journaled in a suitable 'b'earing'ifle; stationary support is provided and While t1iis' cou1dtake variousforms, iii the embodii'nent' of' the invention' illustrated it is-- shown as a bar- I l secured to' th'e tractor frame by spaced bolts 2C A pivot nrerrrberii 3; is provided and "illustrated as=-a --1'iead'ed studor 'boit secured in support I'I adja'cent the'free'endthere off A' member Mc'usurrounds a-ndis rotatable-on pivot I 3 th'eisame having spaced'portions I ibb'etween which extends another headed stud or pivot member 'I 5 1- A portion is 'ofnz frame memher I i extends' between portionsi ib andr'is pivoted on member I5 'It' will :thus be seen; that framed 4' CaliTSWi'HE EbOUIEIJiVOE member I @which is'sh'oW'n as having iav vertical axis; and scan also swing-about pivotimemb'er' iiiesnown as having-a horizontal axis. Theiportionn i A e.- swingable about pivot?! SZIisE-ofWcyIindricai formeandiranoth'errcylin dricai -portion I dtiofi :theframanof rreducedrdiamietery. isrsurrounde'dthereby and: telescopically mounted thereirn Tire: framexportioni I idrcambe rotated in portion I40 and held in a selected position thereon of two positions at right angles to each other by a headed pin I6 adapted to pass through alined holes Me in portion Mo and through either of pairs of holes if formed in portion Md, the pairs of holes I having their centers at right angles to each other. Frame I4 extends longitudinally, as shown in Figs. 1 and 2, in the direction substantially parallel with the axis of shaft IDd.

A short piece of reinforcing pipe Ida, the same diameter a 140, is mounted fast on Md and rotates therewith. A hearing Hg is carried by member I47.

A second shaft I8 is journaled in bearing I4g. Shaft I8 has connected to one end by a universal joint a member I9. Shaft has secured to its end by a universal joint a member 20. While members I9 and 20 might be variously connected, in the embodiment of the invention illustrated, member 20 is formed of square or rectangular cross section and i slidable in an opening extending longitudinally of member' I9, which opening is of similar cross section. .Shaft I8 has secured to its other end a beveled pinion 22 which meshes with a beveled gear '23 rotatable on a stud24 fixed in the frame portions I47 and Md. As shown in Fig. 3, beveled gear 23 comprise a sleeve portion 23a. having a peripheral flange which is rabbeted to receive the tooth portion23b of said gear connected to por- 1 tion 23a by circumferentially spaced bolts 230. I Portion 230. has a flange at its other end to which is secured by circumferentially spaced counteri sunk screws 26, a crank 27. Crank 2? comprises 1 a connecting arm 21a and a counter-weighted oppositely extending portion 212). A crank pin 28 1 is secured adjacent the outer end of arm 270. on

which is pivoted a pitman 29, the other end of which i pivoted on a pin 30 secured to a crosshead 3L Cross-head 3| has a pair of downwardly extending lugs at each end thereof provided with bores through which pass the crosshead guide members 32. The cross-head guide members 32 are secured atone end in'a block 33 surrounding the central portion of the gear sleeve 23a, said sleeve being journaled in said block.

. Sleeve 23a is also surrounded by a spacing collar 34 engaging the same and block 33. Members 32 are secured at their other ends to a frame portion I lh. A reciprocable saw or saw blade 35 is secured to cross-head 3| by paced bolts 35, said saw moving through a guide member l li secured to frame portion I4h. Adjacent to its outer end, frame member Md is apertured to receive a nail or spike. 31 adapted to be driven into the tree or log 40 or other object tobe sawed.

In operation, when an object such as the tree 40 is to be sawed, the device will be located adjacent the same, as shown in Figs. 1 and 2, and

frame member I Id will be secured to the tree by the spike 31. The tractor motor will now be 1 operated to rotate the haft Illd. This will, 1 through the driving connection comprising members I9 and 20, rotate shaft I8. Shaft I3,

1 through the gears 22 and 23, will rotate crank 21, and the cross-head -3 I will be reciprocated by f pitman 29 so that saw 35 will be reciprocated and the tree 40 will be sawed. The frame I l and the saw can readily move about theaxis of pivot member I 3 for the purpose of initially locating Ind i the frame I4 and saw in proper operative'position portant in that it eliminates the otherwise difficult procedure of bringing these parts into the exact correct location by manipulation of the tractor itself. It will, of course, be appreciated that the saw, together with its cross head guide members 32, pivots about the axis of stud 24 to permit the saw to progress through the tree 4!} or other work. The frame I4 can also be swung about the axis of pivot member I5 and the saw 35 can thus be moved to reciprocate in a vertical direction. When this is done the member 20 will move some distance into the member i9, and members I9 and 20 will extend at an angle to shafts Illd and I8. Shaft I3, however, will be effectively driven through the universal joints secured to said shafts. The saw 35 can thus be reciprocated in a vertical direction. Ob-

From the above descritpion it will be seen that I have provided a comparatively simple, compact and easily operable mechanism for operating a saw or drag saw from a tractor. The device can be easily and quickly placed in position, and as above described, the saw can be operated in variou planes and in a vertical or horizontal direction. The saw blade can also be reciprocated vertically or horizontally and the plane of theblade disposed in planes at right angles to each other so that a vertical out can be made to cut up a fallen log or a horizontal out can be made to cut a standing tree. As above described, Md of the frame is rotated in portion I Ic, this being readily permitted by the beveled gears 22 and 23. The object to be sawed can thus be readily sawed in the desired plane. The parts are compactly arranged and efficiently located for the work to be done; When the device i not in use the saw and framecarrying the mechanism can be swung upward in position to be readily transported with the tractor. The device has been amply demonstrated in actual practice and found to be very successful and efficient.

A unique feature of the arrangement described is that the saw driving connections exert a torque twist on the saw and the cross-head guide members 32 which tends to rotate the same in a counterclockwise direction, with respect to Fig. 1, about the axis of the stud 24 and ring gear 23, thereby automatically maintaining the toothed edge of the saw in engagement with the work.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the cope of applicants invention, which generally stated, consists in a device capable of carrying out the objects above set forth, in the parts and combinations of parts disclosed and defined in the appended claim.

What is claimed is:

In a saw structure to be driven by 'a tractor, the combination of a stationary support'secured to said tractor, a rotating driving shaft carried thereby, a pivot member having a substantially horizontal axis carried by said support, a frame swingable about said pivot member and adapted to occupy a position extending longitudinally of said shaft, a bearing carried on said frame, a second shaft journalled in said bearing and substantially aligned with said first-mentioned shaft when said frame is in said longitudinally extended position, an extensible and contractible torque transmitting means having universal joints at its ends connected to said shafts respectively, a reciprocating saw carried by said frame, a, beveled pinion secured to said second shaft, a stud secured to said frame with its axis at right angles to the axis of the second shaft, a beveled gear journalled on said stud meshed with said beveled pinion, a crank secured to said beveled gear, a pitman connected to said crank, a crosshead connected to said pitman and to said reciprocating saw, a cross-head guide carried on said frame, and a perforation adjacent the free end of said frame adapted to receive a spike for securing the same to a log or other member to be sawed.

RAYMOND E. VON RUDEN.

8 REFERENCES CITED The following references are of record in the me of this patent:

v UNITED STATES PATENTS Number 

